Bug 246695 Gtk Embedding widget ignore scrollbar chrome setting

r=bryner sr=blizzard patch by Crispin Flowerday <crispin@flowerday.cx>

embedding/browser/gtk/src/EmbedPrivate.cpp

@@ -61,6 +61,9 @@
 #include <nsIDOMWindowInternal.h>
 #include <nsIChromeEventHandler.h>
 
+// For seting scrollbar visibilty
+#include <nsIDOMBarProp.h>
+
 // for the focus hacking we need to do
 #include <nsIFocusController.h>
 
@@ -145,7 +148,7 @@ EmbedPrivate::EmbedPrivate(void)
   mContentListener  = nsnull;
   mEventListener    = nsnull;
   mStream           = nsnull;
-  mChromeMask       = 0;
+  mChromeMask       = nsIWebBrowserChrome::CHROME_ALL;
   mIsChrome         = PR_FALSE;
   mChromeLoaded     = PR_FALSE;
   mListenersAttached = PR_FALSE;
@@ -286,6 +289,9 @@ EmbedPrivate::Realize(PRBool *aAlreadyRealized)
   gdk_window_get_user_data(tmp_window, &data);
   mMozWindowWidget = NS_STATIC_CAST(GtkWidget *, data);
 
+  // Apply the current chrome mask
+  ApplyChromeMask();
+
   return NS_OK;
 }
 
@@ -403,6 +409,39 @@ EmbedPrivate::LoadCurrentURI(void)
                          nsnull);                           // extra headers
 }
 
+void
+EmbedPrivate::ApplyChromeMask()
+{
+   if (mWindow) {
+      nsCOMPtr<nsIWebBrowser> webBrowser;
+      mWindow->GetWebBrowser(getter_AddRefs(webBrowser));
+
+      nsCOMPtr<nsIDOMWindow> domWindow;
+      webBrowser->GetContentDOMWindow(getter_AddRefs(domWindow));
+      if (domWindow) {
+
+         nsCOMPtr<nsIDOMBarProp> scrollbars;
+         domWindow->GetScrollbars(getter_AddRefs(scrollbars));
+         if (scrollbars) {
+
+            scrollbars->SetVisible
+               (mChromeMask & nsIWebBrowserChrome::CHROME_SCROLLBARS ? 
+                PR_TRUE : PR_FALSE);
+         }
+      }
+   }
+}
+
+
+void
+EmbedPrivate::SetChromeMask (PRUint32 aChromeMask)
+{
+   mChromeMask = aChromeMask;
+
+   ApplyChromeMask();
+}
+
+
 /* static */
 void
 EmbedPrivate::PushStartup(void)

embedding/browser/gtk/src/EmbedPrivate.h

@@ -83,6 +83,9 @@ class EmbedPrivate {
   void        SetURI          (const char *aURI);
   void        LoadCurrentURI  (void);
 
+  void        SetChromeMask   (PRUint32 chromeMask);
+  void        ApplyChromeMask ();
+
   static void PushStartup     (void);
   static void PopStartup      (void);
   static void SetCompPath     (const char *aPath);

embedding/browser/gtk/src/EmbedWindow.cpp

@@ -181,7 +181,7 @@ EmbedWindow::GetChromeFlags(PRUint32 *aChromeFlags)
 NS_IMETHODIMP
 EmbedWindow::SetChromeFlags(PRUint32 aChromeFlags)
 {
-  mOwner->mChromeMask = aChromeFlags;
+  mOwner->SetChromeMask(aChromeFlags);
   return NS_OK;
 }
 

embedding/browser/gtk/src/gtkmozembed2.cpp

@@ -1164,7 +1164,7 @@ gtk_moz_embed_set_chrome_mask(GtkMozEmbed *embed, guint32 flags)
 
   embedPrivate = (EmbedPrivate *)embed->data;
 
-  embedPrivate->mChromeMask = flags;
+  embedPrivate->SetChromeMask(flags);
 }
 
 guint32